package com.hzit.interceptor;

import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * 类名：
 * 作者：WF
 * 功能：定义第一个拦截器
 */
public class FirstInterceptor implements HandlerInterceptor {

	/**
	 *
	 * @param request
	 * @param response
	 * @param handler
	 * @return  true: 放行，代表下一个拦截器会执行，false: 拦截不放行
	 * @throws Exception
	 */
	@Override
	//1. 在控制方法（处理器）执行前调用 （前置通知）
	public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
		System.out.println("FirstInterceptor--->preHandle()");
		return true;
	}

	//2. 在控制器方法执行后调用（后置通知）
	@Override
	public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
		System.out.println("FirstInterceptor--->postHandle()");
	}

	//3. 页面渲染前调用
	@Override
	public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
		System.out.println("FirstInterceptor--->afterCompletion()");
	}
}
